@misc{indiciae9f5bff220d16, title = {Rationale and statistical methodology for the VISA studies.}, author = {M J Ratcliffe and M J Godley}, year = {1989}, doi = {10.2165/00003495-198900382-00013}, url = {https://pubmed.ncbi.nlm.nih.gov/2575981/}, note = {Source identifier: 2575981} }